* {
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
}

body {
    height: 100%;
    background: url(../images/f1_1.jpg) no-repeat center 0 / cover;
}

.cloud img {
    position: absolute;
    left: 50%;
}

.cloud img:nth-child(1) {
    margin-left: -250px;
    top: 20px;
    animation: cloud 1s infinite alternate linear;
}

.cloud img:nth-child(2) {
    margin-left: 400px;
    top: 100px;
    animation: cloud 1s infinite alternate linear 0.4s;
}

.cloud img:nth-child(3) {
    margin-left: -550px;
    top: 200px;
    animation: cloud 1s infinite alternate 0.6s;
}

@keyframes cloud {
    100% {
        transform: translate(20px);
    }
}

.text {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    animation: text 1s;
}

.text :hover {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    animation: text 1s;
}

@keyframes text {
    0% {
        transform: translate(-50%, -50%) scale(1);
    }

    20% {
        transform: translate(-50%, -50%) scale(0.1);
    }

    40% {
        transform: translate(-50%, -50%) scale(1.4);
    }

    70% {
        transform: translate(-50%, -50%) scale(0.5);
    }

    100% {
        transform: translate(-50%, -50%) scale(1);
    }
}